* claim: #4116
* Web: a trackpad swipe pans instead of zooming (#4116)
Browsers deliver trackpad swipes as wheel events without scroll phases, so
the shared navigation treated every vertical swipe as a mouse-wheel zoom.
The web raw-input hook now brackets point-mode swipes (small or horizontal
deltas) with gesture start/end phases, ending after 100 ms idle or before
line/page wheel or pinch input. Wheel notches and pinch still zoom, and
camera input still goes through navigation::handle.
raykholo
be87303683